Attachment for sewing machines



.March 15, 1932'. w. c. HAKE 1,849,797

ATTACHMENT FOR SEWING MACHINES Filed May 23. 1931 3 in the form of a passage guide and, at the same time,

Patented Mar. 15, 1932 WILLIAM. c. HAKE, on s'r. LOUIS, MISSOURI ATTACHMENT FOR SEWING MACHINES Application filed May 23,

attachment for guiding to the stitching mech anism of a sewing machine an improved guide for guiding the tape and placing an edge portion of the tape across the stitching mechanism. The passage 1s provided with an elongated slot in its upper side and has a stationary elongated member extending into the slot between the walls of the guide and presenting an elongated edge for contact with the serrated edge of the tape continuously during movement of the tape through said passage. Thus, the tape is pressed to posltionin which the opposite or lower edge of the tape is against the wall of the passage opposite from said slot.

The present invention is distinguished. from the invention of said application and employs a rotary element cooperating with thepresser roller of the attachment and adapted to engage the upper edge of the tape whether the tape is serrated or not so as to cooperate in moving the tape through the fold over the upper edge of the tape and thereby hold the tape out of the way of the needle and prevent the tape from becoming caught or obstructed in the guide.

An object of the invention is to provide an improved sewing machine attachment constructed and arranged as above indicated and as hereinafter described, reference being made to the accompanying drawings, in which Fig. 1 is a front elevation of my improved attachment for sewing machines.

Fig. 2 is a side elevation.

Fig. 3 is a side elevation opposite from that shown in Fig. 2.

Fig. 4: is a vertical sectional view illustrat ing the construction and arrangement of the rotary guide for the tape.

Fig. 5 is a perspective view of a portion of a shoe upper having a serrated tape attached 1931. Serial No. 539,464.

ElIGIGtO by a machine using thepresent inven- The sewing machine attachment in which I have embodied the pr-esentinventionis adapt ed to be mounted in a sewing machine having an arm 1 and a vertically reciprocating needle bar 2 that supports and operates the needle 3. A depending bracket i'is rigid withthe arm 1 and constitutes a support for the attachment, which is the subject of the present invention.

My improved attachment comprises a downwardly and laterally curved arm 5 at tached to the lower end of the bracket 4 by a releasable screw fastener 6. A cone screw 7 is mounted in the lower end of the arm 5 and functions as a supporting member for one of the bearings on which the presser roller 8 is mounted.

A disc 9 is mounted in threaded engagement with the shank of the cone screw adjacent to the arm 5, which disc has a hub portion 10 that extends in a direction away from the arm 5. The disc 9 and the hub portion 10 form a cone nut for the ball race that constitutes a part of the bearing for the presser roller. The end of the cone screw 7 is formed with a flange 11 having a hub portion 12 extending toward the hub portion 10 of the disc 9. The member comprising the flange l1 and the hub portion 12 constitutes the head of the cone screw. The hubs 10 and 12 constitute raceways for a series of ball bearing elements 13 which function as journal bearings and also as thrust bearings for the presser roller 8;

The presser roller 8 is formed with a hub 141 having an internal flange 15 that'extends between and separates the two series of ball bearings 13 and constitutes a thrust shoulder while the adj acent inner peripheral portions of the hub constitute the journal portions of the bearing.

A disc 16 is seated in a countersunk portion in the inner face of the presser roller, said disc 16 being proportioned in respect of the circumferentialwall of the recess formed-by the countersunk portion, so'that it will be frictionally held therein by a pressed fit. The disc 16 has a central opening therethrough" through which a screw 17 extends, said'screw 17 entering an opening in the head of the cone Screw. The head of the screw 17 serves to close the opening between the shank of the screw 17 and the adjacent walls of the open-- presser roller 8'. The screw 17 also serves another function namely, to hold the disc 16 in assembled relation with the head of the cone screw in the event that the disc 16 is displaced from the recess in the presser roller.

A flange 18 curves inwardly and outwardly from the marginal portion of the disc 16 cooperating therewith to form a circumferential groove 19.

The front side of the presser roller 8 has a dished recess or concavity 20 and the periphery of said roller is knurled so as to obtain better engagement with the material passing thereunder; I

The device includes a bracket 21 mounted and held on the shank of the cone screw 7 by a nut 22 screwed thereon. A screw fastener 23 passes through said bracket '21 and into the arm 5 and cooperates with the cone screw 7 to support said bracket 21 in rigid position.

The guiding device for the tape comprises a curved wall 24 and a cooperating wall 25 arranged approximately parallel with the lower portion of the wall 24 and forming a' slot or passage26 through and by which the tape 27 is passed and guided. The lower portions of these walls 24 and 25 are below the peripheral groove 19 and have a notch 28 receiving a portion of the body of the disc 16, so that the upper edge of the tape passing through the guide becomes engaged with the flange 18 and thereby folded downwardly and held close enough to the presser roller 8 to be out of the way of the needle 3.

Both of the walls 24 and 25 terminate short of the path of the needle 3, so that the needle passes beyond the ends of said walls and engages the lower marginal edge of the tape to form a longitudinal row of stitches 29 securing the marginal edge of the tape to the marginal edge of the shoe upper or other material 30. A curved arm 31 projects beyond the end of the wall 25 and forms a support providing an upper edge against and over which the upper portion of the tape is folded and held folded by the disc flange 19.

'The tape is thus held folded for a sufficient distance beyond the path of the needle 3 to prevent the upper folded edge of the tape from extending outwardly into the path of said needle 3.

The oppositeend of the wall 25 is formed 3 with a flexibleextension 32, which serves to press thetape against the wall 24 and hold the tape in position to enter the guide slot 26. The end of the wall 24 supports a loop stitching mechanism of a sewing machine comprising substantially parallel spaced walls forming a passage for guiding the tape and placing one edge portion of the tape across the stitching mechanism, an arm projecting beyond one of said walls laterally from the stitching mechanism, and means for folding the upper edge portion of the tape downwardly over said arm.

2. An attachment for guiding tape to the stitching mechanism of a. sewing machine comprisingjstationary walls forming a pasthe 3 sage for guiding the tape, a dished presser roller cooperating with said passage toeXtend one edge portion of the tape laterally across the stitching mechanism, and means for fold ing downwardly and laterally out of the way of the stitching mechanism theopposite edge portion of the tape.

3. An attachmentfor guiding tape to the stitching mechanism of a sewing machine comprising walls forming a passage'for guiding the tape to the stitching mechanism, a dished 'presser roller cooperating with said passage to extend one edge portion of the tape laterally across the stitching mechanism,- a stationary arm for supporting the opposite edge portion of the tape folded thereover, a'nd'a device for folding said opposite portion of said tape over said arm. 7 V r 4. An attachment for guiding. tape to the stitching mechanism of a sewing machine comprising walls'forming a passage for guiding the tape to the stitching'mechanism, a dished presser roller cooperating with said passage to extend one edge portion. of the tape laterally across the stitching mechanism, a stationary arm for supporting the opposite edge portion. of the tape folded thereover, and a rotary disc having therein a circumfer ential groove adapted to. receive and foldsaid opposite portion of said tape over said arm.-

5. An attachment for guiding tape to the stitching mechanism of a sewing machine comprising walls forming a passage for guiding the tape, a device for cooperating with said walls for extending one edge portion of the tape laterally across the stitching mechanism, and a rotary member for folding the opposite edge of the tape downwardly and ion laterally out of the way of the stitching mechs comprising walls forming a passage for guiding the tape, a device for cooperating with said walls for extending one edge portion of the tape laterally across the stitching mechanism, a rotary member for folding the opposite edge of the tape downwardly and laterally out of the way of the stitching mechanism, and a stationary arm for supporting said folded portion of said tape.

7. An attachment for sewing machines for guiding tape to the stitching mechanism comprising walls forming a passage for guiding the tape to the stitching mechanism, means cooperating with said walls to extend one edge portion of the tape laterally across the stitching mechanism, an arm for supporting the opposite edge portion ofthe tape folded, and means for folding said opposite portion of the tape downwardly across said arm.

29 8. An attachment for guiding tape to the stitching mechanism of a sewing machine comprising cooperating devices for guiding the tape and for extending one edge of the tape laterally across the stitching mecha- 5 nism, a rotary disc having a circumferential groove for receiving and folding downwardly the opposite edge of the tape, and means for supporting said folded edge of said tape.

9. An attachment for guiding tape to the 30 stitching mechanism of a sewing machine comprising devices for guiding the tape in an inclined plane toward the stitching mechanism and extending the lower edge portion of the tape laterally across the stitching mechanism, and devices for folding downwardly and holding the opposite edge of the tape out of the way of the stitching mechanism.

10. An attachment for sewing machines comprising a device for guiding tape in an 4.1; inclined plane toward the stitching mechanism of a sewing machine, a dished presser roller for extending the lower edge of the tape laterally across the stitching mechanism, a stationary arm carried by said device, and

5 a rotary device for folding the opposite edge of the tape downwardly across said stationary arm out of the way of the stitching mechanism.

11. An attachment for sewing machines comprising devices for guiding tape in an inclined plane toward the stitching mechanism of a sewing machine and extending the lower edge of the tape across the stitching mechanism, a stationary arm, and a rotary disc for folding the upper edge of the tape across said stationary arm and holding said folded edge of the tape laterally out of the way of the stitching mechanism.

WILLIAM C. HAKE. 

